An accused knife-wielding woman who chased another off a 14-storey balcony was a young mother angry that the victim was giving her 3-year-old daughter birthday gifts, according to the victim's family.

Sienna Edwards, 20, plunged to her death off the New York apartment building after making a secret 911 call in which the operator heard voices in the
background saying, ‘you’re not going to get out of here alive’.

Accused attacker Kenya Edmonds, 23, was arraigned on murder charges and held without bail Friday in Thursday evening's death outside the Bronx apartment building.

Scroll down for video

Killed: A spokeswoman for the medical examiner's office said Sienna Edwards' death had been ruled a homicide. The 20-year-old plunged off a balcony in the Bronx, New York, while being chased

Ms Edwards had gone to deliver the birthday gifts as a favour to her boyfriend’s cousin.

'[Edmonds] was mad because Sienna
came to her house for her baby’s father,' a relative of Ms Edwards told
the New York Daily News.

RELATED ARTICLES

Share this article

Ms Edwards' boyfriend, Timothy Smith,
23, said the attacker chased her to her death in what he
alleged was a case of mistaken identity.

Prosecutors said Ms Edwards attempted to jump from one balcony to another on the building in an attempt to escape her attacker, but fell.

Tragedy: The 20-year-old plunged 14 stories to her death after making a secret 911 call in which the operator heard threatening voices in the background

A restraining order prevents Smith’s
cousin, Carl Purcell, 22, from entering the fourteenth-floor apartment where
his ex-girlfriend and their three-year-old daughter live.

He had asked Edwards to
deliver a birthday cake to his daughter on his behalf - but those inside mistook her
to be Purcell's new girlfriend, according to the account given by Smith to the New York Daily News.

At 9.30 pm, shortly after Edwards had arrived at the
apartment where Purcell's ex-girlfriend, Kenya, and two other women were
present, police received an ominous 911 phone call. The caller did not speak but the voice of a threatening female was heard in the background.

'In there background there are voices saying you're not going to get out of here alive, you're not going to get out of here alive,' New York City Police Commissioner Raymond Kelly told reporters on Friday.

Location: The Bronx apartment where the 20-year-old was chased to her death

Tributes: Mourners lit candles in the spot where Edwards tragically fell to her death

Evidence: 'In there background there are voices saying you're not going to get out of here alive,' New York City Police Commissioner Raymond Kelly told reporters on Friday

The 911 dispatcher heard as many as six threats, Paul Browne, the NYPD's chief spokesman, added.

After the secret cry for help, police
were dispatched to the closest cell phone tower, situated one block from the building, but were not able to
trace the exact location of the phone call.

Ten minutes later, at about 10 pm,
someone called 911 and reported that Edwards had committed suicide by
jumping over a five-foot high balcony ledge.

But police were immediately suspicious. 'The investigative premise is that she may have been pushed from that balcony or fell trying to escape individuals who were threatening to kill her,' Browne said earlier.

A spokeswoman
for the medical examiner’s office has since ruled Edwards’s death a homicide.

During Edwards' time in the Bronx apartment, she also called her boyfriend for help, who rushed to her aid from the Harlem apartment they share.

But, when he arrived, he found her dead body on the ground outside.

'When she called me, she said they
had a knife to her neck,' Smith told the New York Daily News. 'I called her back
50 times but I never heard back from her.'

'They told her the only way she was
leaving was in a body bag,' he added to the Wall Street Journal.

'She tried to help people. People liked being around her. She was an outgoing person,' he added.